JavaScript API

The JavaScript API is the best way to call it programmatically.

Type Definition:

declare const registerable: <T extends 'nest.land' | 'npm' | 'deno.land'>(
  name: string,
  option?: Partial<Option<T>> | undefined
) => Promise<RegisterableResult<T>>

Parameters

registerable(name, option)

This function accept 2 arguments.

name [`required`]

name	type	desc
`name`	`string`	Query name

option [`optional`]

name	type	desc	default
`registry`	`array`	Pick the package registry to query. choice: `deno.land`, `nest.land` and `npm`	[`deno.land`, `nest.land`, `npm`]
`mode`	`string`	Specifies where this function is called. choice: `server` or `universal`	`server`

What is mode?

You can avoid CORS errors by specifying the mode. For server mode, it queries the public API in the package registry directly.

With the exception of deno.land, the public api response headers do not have the Access-Control-Allow-Origin property set. That is, if call this function from browser, you will get a CORS error.

To avoid this, we have prepared a Proxy server. It returns the result of running the registerable function on the server and the response header with Access-Control-Allow-Origin: * added.

You can get the result from the following URL:

https://registerable.vercel.app/check-name

Mode of universal queries this URL and gets the same results as server mode without CORS errors.

If there is a possibility of calling the registerable function from a Browser such as SPA or SSR, the mode should be universal.

However, if it is clear that it will be called only on the server side, it is recommended to use in server mode from the viewpoint of performance. Therefore, it is set to server mode by default.

Return value

The return value is a JSONObject that indicates whether it can be registered in the package registry, an error message if there is a validation error in query name, and which query caused the error.

{
  result: {
    "deno.land"?: boolean,
    "nest.land"?: boolean,
    npm?: boolean,
  },
  error: {
     "deno.land"?: string,
     "nest.land"?: string,
      npm?: string,
  },
  hasError: boolean,
  errorRegistry: ("deno.land" | "nest.land" | npm)[],
  name: string,
}

name	desc
`name`	Same as query name
`result`	Map of registry name and result of registerable or not
`error`	Map of registry name and validation error message
`hasError`	Set this flag to `true` if each registry query has more than one name validation error.
`errorRegistry`	List the registry names that had validation errors

Definition of error

If the package name exists, it will not be treated as an error. Violation of the package name rules in each package registry will report an error.

Click here for package name validation rules.

For example, if there is a validation error as the package name for deno.land and nest.land :

const { result, error, errorRegistry } = await registerable('exist-package-name')
// result
{
  result: {
    "deno.land": false,
    "nest.land": false,
    npm: true,
  },
  error: {
     "deno.land": "Name contains only the characters a-z, 0-9 and _",
     "nest.land": "Name contains only the characters a-z, 0-9 and _",
  },
  hasError: true,
  errorRegistry: ["deno.land", "nest.land"],
  name: "exist-package-name",
}

errorRegistry.forEach((registry) => console.warn(registry, error[registry]))
// deno.land "Name contains only the characters a-z, 0-9 and _"
// nest.land "Name contains only the characters a-z, 0-9 and _"

Examples

await registerable('not_exist_package')
// result
{
  result: {
    "deno.land": true,
    "nest.land": true,
    npm: true,
  },
  error: {},
  hasError: false,
  errorRegistry: [],
  name: "not_exist_package",
}

await registerable('not_exist_package', {
  registry: ['deno.land']
})
// result
{
  result: {
    "deno.land": true
  },
  error: {},
  hasError: false,
  errorRegistry: [],
  name: "not_exist_package",
}

# JavaScript API

# Parameters

# name [required]

# option [optional]

# What is mode?

# Return value

# Definition of error

# Examples